منشأت معدنية Steel structure 155

Torsion Warping st.venant torsion pure torsion nonuniform torsion G-shear modulus of rigidity J- shear constant Cw warping constant torsion in shaft (circular cross-section) torsion in noncircular section warping stresses in I-beam warping stresses in C-channel Shear stress-strain relation Torsion stress distribution Warping stress distribution Design for torsion Design for warping How to resist torsion in concrete? How to resist torsion in steel profiles? braced and unbraced members restraint and unrestrained members